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We relate the quantum Steenrod square to Seidel's equivariant pair-of-pants product for open convex symplectic manifolds that are either monotone or exact, using an equivariant version of the PSS isomorphism. We proceed similarly for…

Symplectic Geometry · Mathematics 2022-04-13 Nicholas Wilkins

We present a method for constructing covariantly constant endomorphisms for the mod $p$ equivariant quantum connection, using the quantum Steenrod power operations of Fukaya and Wilkins. The example of the cotangent bundle of the projective…

Symplectic Geometry · Mathematics 2025-04-08 Jae Hee Lee

In this note we prove that if a closed monotone symplectic manifold admits a Hamiltonian pseudo-rotation, which may be degenerate, then the quantum Steenrod square of the cohomology class Poincar\'{e} dual to the point must be deformed.…

Symplectic Geometry · Mathematics 2019-11-06 Egor Shelukhin

The Steenrod squares are cohomology operations with important applications in algebraic topology. While these operations are well-understood classically, little is known about them in the setting of homotopy type theory. Although a…

Algebraic Topology · Mathematics 2025-04-14 Axel Ljungström , David Wärn

In this note we prove that if a closed monotone symplectic manifold $M$ of dimension $2n,$ satisfying a homological condition that holds in particular when the minimal Chern number is $N>n,$ admits a Hamiltonian pseudo-rotation, then the…

Symplectic Geometry · Mathematics 2020-04-28 Egor Shelukhin

In the context of symplectic dynamics, pseudo-rotations are Hamiltonian diffeomorphisms with finite and minimal possible number of periodic orbits. These maps are of interest in both dynamics and symplectic topology. We show that a closed,…

Symplectic Geometry · Mathematics 2020-06-23 Erman Cineli , Viktor L. Ginzburg , Basak Z. Gurel

We study the mod $p$ equivariant quantum cohomology of conical symplectic resolutions. Using symplectic genus zero enumerative geometry, Fukaya and Wilkins defined operations on mod $p$ quantum cohomology deforming the classical Steenrod…

Symplectic Geometry · Mathematics 2025-12-03 Jae Hee Lee

In 1947, N.E. Steenrod defined the Steenrod Squares, which are mod 2 cohomology operations, using explicit cochain formulae for cup-i products of cocycles. He later recast the construction in more general homological terms, using group…

Algebraic Topology · Mathematics 2021-06-25 Greg Brumfiel , Anibal M. Medina-Mardones , John Morgan

We prove a conjecture raised by M. Goresky and W. Pardon, concerning the range of validity of the perverse degree of Steenrod squares in intersection cohomology. This answer turns out of importance for the definition of characteristic…

Algebraic Topology · Mathematics 2016-09-15 David Chataur , Martintxo Saralegi-Aranguren , Daniel Tanré

This paper is concerned with quantum cohomology and Fukaya categories of a closed monotone symplectic manifold X, where we use coefficients in a field k of characteristic p > 0. The main result of this paper is that the quantum Steenrod…

Symplectic Geometry · Mathematics 2024-08-29 Zihong Chen

We construct an equivariant extension of the quantum Kirwan map and show that it intertwines the classical Steenrod operation on the cohomology of a classifying space with the quantum Steenrod operation of a monotone symplectic reduction.…

Symplectic Geometry · Mathematics 2024-05-22 Guangbo Xu

First, by inspiration of the results of Wood \cite{differential,problems}, but with the methods of non-commutative geometry and different approach, we extend the coefficients of the Steenrod squaring operations from the filed $\mathbb{F}_2$…

Algebraic Topology · Mathematics 2017-09-21 Ali S. Janfada , Ghorban Soleymanpour

In Part I, we use Steenrod's construction to prove that the quantum Coulomb branch is a Frobenius-constant quantization. We will also demonstrate the corresponding result for the $K$-theoretic version of the quantum Coulomb branch. In Part…

Representation Theory · Mathematics 2018-01-16 Gus Lonergan

Categorified quantum groups play an increasing role in quantum topology and representation theory. The Steenrod algebra is a fundamental component of algebraic topology. In this paper we show that categorified quantum groups can be extended…

Quantum Algebra · Mathematics 2013-04-29 Anna Beliakova , Benjamin Cooper

We propose a general procedure to construct noncommutative deformations of an algebraic submanifold $M$ of $\mathbb{R}^n$, specializing the procedure [G. Fiore, T. Weber, Twisted submanifolds of $\mathbb{R}^n$, arXiv:2003.03854] valid for…

Mathematical Physics · Physics 2021-05-24 Gaetano Fiore , Davide Franco , Thomas Weber

Given a singular variety I discuss the relations between quantum cohomology of its resolution and smoothing. In particular, I explain how toric degenerations helps with computing Gromov--Witten invariants, and the role of this story in…

Algebraic Geometry · Mathematics 2018-09-12 Sergey Galkin

For an arbitrary link $L \subset S^3$ , Sarkar-Scaduto-Stoffregen construct a family of spatial refinements of even and odd Khovanov homology. We give a computation of $\text{Sq}^2$ on these spaces, determining their stable homotopy types…

Geometric Topology · Mathematics 2026-05-29 Advika Rajapakse

We show that if a semipositive symplectic manifold $M^{2n}$ is Steenrod uniruled, in the sense that the quantum Steenrod power of the point class does not agree with its classical Steenrod power for any prime, then the (rational) quantum…

Symplectic Geometry · Mathematics 2021-11-18 Semon Rezchikov

Recently, Sarkar-Scaduto-Stoffregen constructed a stable homotopy type for odd Khovanov homology, hence obtaining an action of the Steenrod algebra on Khovanov homology with $\mathbb{Z}/2\mathbb{Z}$ coefficients. Motivated by their…

Geometric Topology · Mathematics 2025-10-03 Dirk Schuetz

Fix a prime $p > 3$. Working over $\mathbb{Z}_p$, we show that the quantum connection of any closed Calabi-Yau threefold gives rise to a Fontaine-Laffaile module when restricted to the even degree and torsion-free part of $p$-adic quantum…

Symplectic Geometry · Mathematics 2026-03-26 Shaoyun Bai , Jae Hee Lee , Daniel Pomerleano
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